# N972AK: 2021 Boeing 737-9

- Status: Valid registration
- Airframe: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (registry code 138469A, 48 seats)
- Engine: [CFM International LEAP-1B28 series](https://openairdocs.org/engine/cfm-international-leap-1b28-series) (registry code 13120)
- Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE) (The Boeing Company), [TCDS E00088EN](https://openairdocs.org/tcds/E00088EN) (CFM International S.A.) (OpenAirDocs)
- Serial number: 43389
- Year built: 2021
- Type: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: January 14, 2022
- Certificate issued: April 7, 2022
- Expires: April 30, 2029
- Mode S code: AD8B1D
- Registered owner: [Alaska Airlines Inc](https://openairdocs.org/faa-owner/ALASKA%20AIRLINES%20INC)
- Location: [Seatac, WA](https://openairdocs.org/faa-place/WA/Seatac)
- Owner type: Corporation
- Owner's area on the map: 47.4466° N, 122.2721° W: Placed by OpenAirDocs at the center of ZIP code 98188, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=972AK
- Page: https://openairdocs.org/aircraft/N972AK

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every CFM International LEAP-1B28 model are included.

## ADs that may apply (OpenAirDocs): 48 in force

### Matched by airframe (Boeing 737-9)

- [AD 2026-18-07](https://openairdocs.org/ad/2026-18-07): Fuselage · Boeing 737-8, 737-9 and 737-8200. Effective Oct 22, 2026
- [AD 2026-15-11](https://openairdocs.org/ad/2026-15-11): Fuselage · Boeing 737-8, 737-9 and 737-8200. Effective Sep 10, 2026
- [AD 2026-14-11](https://openairdocs.org/ad/2026-14-11): Air Conditioning · Boeing 737-8, 737-9 and 737-8200. Effective Jul 13, 2026
- [AD 2026-13-17](https://openairdocs.org/ad/2026-13-17): Navigation · Boeing 737-8, 737-9 and 737-8200. Effective Jul 1, 2026
- [AD 2026-13-02](https://openairdocs.org/ad/2026-13-02): Navigation · Airbus Canada Limited Partnership 18, 49-46, 80-A and 555 more. Effective Jul 1, 2026
- [AD 2025-25-04](https://openairdocs.org/ad/2025-25-04): Equipment/furnishings · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 6 more. Effective Jan 16, 2026
- [AD 2025-02-07](https://openairdocs.org/ad/2025-02-07): Navigation · Modification of Rockwell Collins, Inc. Multi-Mode Receiver (STC ST01883WI or 4 others). Effective Mar 17, 2025
- [AD 2024-23-11](https://openairdocs.org/ad/2024-23-11): Flight controls · Boeing 737-8, 737-9 and 737-8200. Effective Jan 6, 2025
- [AD 2024-19-06](https://openairdocs.org/ad/2024-19-06): Ice/Rain Protection System · Boeing 737-8 and 737-9. Effective Nov 26, 2024
- [AD 2024-13-02](https://openairdocs.org/ad/2024-13-02): Oxygen · Boeing 737-8, 737-9, 737-8200 and 3 more. Effective Jul 25, 2024
- [AD 2024-06-03](https://openairdocs.org/ad/2024-06-03): Electrical Power · Boeing 737-8 and 737-9. Effective May 22, 2024
- [AD 2024-03-04](https://openairdocs.org/ad/2024-03-04): Flight controls · Boeing 737-8, 737-9 and 737-8200. Effective Feb 12, 2024
- [AD 2024-02-51](https://openairdocs.org/ad/2024-02-51): Doors · Boeing 737-9. Effective Jan 18, 2024
- [AD 2023-15-05](https://openairdocs.org/ad/2023-15-05): Ice and Rain Protection, Powerplant · Boeing 737-8, 737-9 and 737-8200. Effective Aug 25, 2023
- [AD 2023-12-11](https://openairdocs.org/ad/2023-12-11): Navigation · Boeing 737-8, 737-9 and 737-8200. Effective Jun 21, 2023
- [AD 2023-10-02](https://openairdocs.org/ad/2023-10-02): Indicating/Recording System, Navigation · Boeing 18, 23, 35 and 1,060 more. Effective May 26, 2023
- [AD 2023-05-06](https://openairdocs.org/ad/2023-05-06): Fuel · Boeing 737-8, 737-9 and 737-8200. Effective May 10, 2023
- [AD 2023-04-17](https://openairdocs.org/ad/2023-04-17): Fuel · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 5 more. Effective May 1, 2023
- [AD 2023-06-10](https://openairdocs.org/ad/2023-06-10): Ice and Rain Protection, Powerplant · Boeing 737-8, 737-8200 and 737-9. Effective Apr 11, 2023
- [AD 2022-24-09](https://openairdocs.org/ad/2022-24-09): Air conditioning · Boeing 737-100 Series, 737-200 Series, 737-200C Series and 12 more. Effective Jan 26, 2023
- [AD 2022-06-06](https://openairdocs.org/ad/2022-06-06): Flight controls · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 5 more. Effective Jun 16, 2022
- [AD 2021-19-19](https://openairdocs.org/ad/2021-19-19): Wings · Boeing 737-9. Effective Dec 8, 2021
- [AD 2021-13-18](https://openairdocs.org/ad/2021-13-18): Powerplant · Boeing 737-8, 737-8200 and 737-9. Effective Sep 3, 2021
- [AD 2021-16-15](https://openairdocs.org/ad/2021-16-15): Air conditioning · Boeing 737-8, 737-800 Series, 737-8200 and 2 more. Effective Aug 9, 2021
- [AD 2021-12-13](https://openairdocs.org/ad/2021-12-13): Fuel · Boeing 737-8 and 737-9. Effective Jul 29, 2021
- [AD 2021-10-07](https://openairdocs.org/ad/2021-10-07): Autoflight, Flight controls · Boeing 737-8 and 737-9. Effective Jul 8, 2021
- [AD 2021-08-04](https://openairdocs.org/ad/2021-08-04): Oxygen · Boeing 737-200 Series, 737-300 Series, 737-400 Series and 23 more. Effective May 26, 2021
- [AD 2021-09-08](https://openairdocs.org/ad/2021-09-08): Electrical power system · Boeing 737-8 and 737-9. Effective Apr 30, 2021
- [AD 2021-01-04](https://openairdocs.org/ad/2021-01-04): Doors · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 5 more. Effective Mar 29, 2021
- [AD 2020-24-02](https://openairdocs.org/ad/2020-24-02): Auto flight, Flight controls, and Indicating/recording systems · Boeing 737-8 and 737-9. Effective Nov 20, 2020
- [AD 2020-21-02](https://openairdocs.org/ad/2020-21-02): Fire protection · Airbus Canada Limited Partnership BD-500-1A10, BD-500-1A11, A330-201 and 45 more. Effective Nov 19, 2020
- [AD 2020-11-12](https://openairdocs.org/ad/2020-11-12): Nacelles/pylons · Boeing 737-8 and 737-9. Effective Jul 30, 2020
- [AD 2020-14-09](https://openairdocs.org/ad/2020-14-09): Fuel storage · Boeing 737-8 and 737-9. Effective Jul 15, 2020
- [AD 2020-03-10](https://openairdocs.org/ad/2020-03-10): Fuselage · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 5 more. Effective Mar 27, 2020
- [AD 2019-18-03](https://openairdocs.org/ad/2019-18-03): Exhaust · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 5 more. Effective Oct 3, 2019
- [AD 2019-14-12](https://openairdocs.org/ad/2019-14-12): Flight Controls · Boeing 737-8 and 737-9. Effective Aug 30, 2019
- [AD 2019-14-02](https://openairdocs.org/ad/2019-14-02): Hydraulic power · Boeing 737-100 Series, 737-200 Series, 737-200C Series and 11 more. Effective Aug 27, 2019
- [AD 2018-23-12](https://openairdocs.org/ad/2018-23-12): Equipment/furnishings · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 180 more. Effective Dec 28, 2018
- [AD 2018-20-13](https://openairdocs.org/ad/2018-20-13): Fuel · Boeing 757-200 Series, 757-200CB Series, 757-200PF Series and 13 more. Effective Nov 15, 2018

### Matched by engine (CFM International LEAP-1B28 series)

- [AD 2025-14-08](https://openairdocs.org/ad/2025-14-08): Turbine Section · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Aug 25, 2025
- [AD 2025-04-12](https://openairdocs.org/ad/2025-04-12): Turbine Section · CFM International LEAP-1A23, LEAP-1A24, LEAP-1A24E1 and 24 more. Effective Apr 8, 2025
- [AD 2024-25-02](https://openairdocs.org/ad/2024-25-02): Turbine Engine Compressor Section · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Feb 12, 2025
- [AD 2023-07-11](https://openairdocs.org/ad/2023-07-11): Turbine Engine Compressor Section · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Jun 13, 2023
- [AD 2022-17-02](https://openairdocs.org/ad/2022-17-02): Turbine Engine Accessory Drive · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Oct 20, 2022
- [AD 2022-11-02](https://openairdocs.org/ad/2022-11-02): Turbine Engine Compressor Section, Turbine Section · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Jul 8, 2022
- [AD 2021-10-06](https://openairdocs.org/ad/2021-10-06): Engine Controls · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective May 10, 2021
- [AD 2020-06-01](https://openairdocs.org/ad/2020-06-01): Turbine/Turboprop · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Apr 16, 2020
- [AD 2018-20-01](https://openairdocs.org/ad/2018-20-01): Turbine Section · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Dec 17, 2018

### Historical (superseded or no longer in force)

- [AD 2026-13-05](https://openairdocs.org/ad/2026-13-05) (historical): Air conditioning · Boeing 737-8, 737-9 and 737-8200. Effective Jul 16, 2026
- [AD 2026-04-05](https://openairdocs.org/ad/2026-04-05) (historical): Electrical Power · Boeing 737-8, 737-9 and 737-8200. Effective Feb 24, 2026
- [AD 2023-09-04](https://openairdocs.org/ad/2023-09-04) (historical): Equipment/furnishings · Boeing 737-600 Series, 737-700 Series, 737-700C Series and 5 more. Effective Jun 29, 2023
- [AD 2022-03-20](https://openairdocs.org/ad/2022-03-20) (historical): Navigation · Boeing 737-8, 737-9 and 737-8200. Effective Jan 31, 2022
- [AD 2021-14-20](https://openairdocs.org/ad/2021-14-20) (historical): Cabin Altitude Pressure Switches · Boeing 737-100 Series, 737-200 Series, 737-200C Series and 12 more. Effective Jul 20, 2021
- [AD 2020-03-20](https://openairdocs.org/ad/2020-03-20) (historical): Navigation · Modification of Rockwell Collins, Inc. Multi-Mode Receiver (STC ST01883WI or 4 others). Effective Feb 18, 2020
- [AD 2018-23-51](https://openairdocs.org/ad/2018-23-51) (historical): Flight controls · Boeing 737-8 and 737-9. Effective Dec 21, 2018
- [AD 2023-23-12](https://openairdocs.org/ad/2023-23-12) (historical): Turbine Section · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Jan 16, 2024
- [AD 2019-12-01](https://openairdocs.org/ad/2019-12-01) (historical): Turbine Engine Accessory Drive · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Jul 3, 2019
- [AD 2018-25-09](https://openairdocs.org/ad/2018-25-09) (historical): Engine Controls · CFM International LEAP-1B21, LEAP-1B23, LEAP-1B25 and 8 more. Effective Dec 26, 2018

## Information bulletins (advisory) (4 in force)

- [SAIB 2026-17](https://openairdocs.org/saib/2026-17): VNAV Approach Disconnect Following Missed Approach, Anomaly on Airplanes with FMC U14.0/14.1. Issued Oct 3, 2026
- [SAIB NM-20-02](https://openairdocs.org/saib/NM-20-02): Fire Protection. Issued Mar 11, 2020
- [SAIB NE-19-03](https://openairdocs.org/saib/NE-19-03): Escape Slide Maintenance Tasks and Intervals - JASC 2565. Issued Feb 19, 2019
- [SAIB NM-18-33](https://openairdocs.org/saib/NM-18-33): Engine Fuel and Control. Issued Dec 17, 2018

## NTSB investigations

None matched to N972AK.

## FAA accident and incident reports

None matched to N972AK.

## Service difficulty reports (48)

As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR ASAA2026030364675](https://openairdocs.org/sdr/ASAA2026030364675), Mar 3, 2026: BATTERY PACK. DISCHARGED. EMERGENCY LIGHTS OUT AT R2 DOOR ABOVE AND ON AFT GALLEY- NOTE EXTERIOR LIGHTS FOR THIS BATTERY PACK ARE ALSO OUT. GROUNDED - YES. REMOVED AND REPLACED AFT R/H E
- [SDR ASAA2026030364674](https://openairdocs.org/sdr/ASAA2026030364674), Mar 3, 2026: BATTERY PACK. DISCHARGED. EMERGENCY LIGHTS OUT AT OVERHEAD BINS RIGHT SIDE ROWS 1,4,9 AND 13 AND ABOVE R1 DOOR G1 GALLEY. NOTE EXTERIOR LIGHTS FOR THIS BATTERY PACK ARE ALSO OUT. GROUNDE
- [SDR ASAA2025102361896](https://openairdocs.org/sdr/ASAA2025102361896), Oct 23, 2025: SEAT TRACK. DAMAGED. COPILOT AFT INBOARD SEAT TRACK HAS LOCK HOLES THAT ARE ELONGATED OUT OF LIMITS. SRXR430X. GROUNDED - YES. REMOVED AND REPLACED COPILOT AFT INBOARD SEAT TRACK IA
- [SDR ASAA2025102361895](https://openairdocs.org/sdr/ASAA2025102361895), Oct 23, 2025: SEAT TRACK. DAMAGED. PILOT AFT INBOARD SEAT TRACK HAS LOCK HOLES THAT ARE ELONGATED OUT OF LIMITS. SRXR430X. GROUNDED - YES. REMOVED AND REPLACED PILOT AFT INBOARD SEAT TRACK IAW CM
- [SDR ASAA2025102261894](https://openairdocs.org/sdr/ASAA2025102261894), Oct 22, 2025: POWER SUPPLY. INOPERATIVE. BATERY PACK CAPACITY CK FAILED AT FWD ENTRY LT, AFT ENTRY LT, AND 17-23 ROWS LOCATION. SRXR430X. GROUNDED - YES. REMOVED AND REPLACED BATTERY POWER SUPPLY AT M1
- [SDR ASAA2025102261893](https://openairdocs.org/sdr/ASAA2025102261893), Oct 22, 2025: POWER SUPPLY. INOPERATIVE. BATERY PACK CAPACITY CK FAILED AT FWD ENTRY LT, AFT ENTRY LT, AND 17-23 ROWS LOCATION. SRXR430X. GROUNDED - YES. REMOVED AND REPLACED BATTERY POWER SUPPLY AT M1
- [SDR ASAA2025102261892](https://openairdocs.org/sdr/ASAA2025102261892), Oct 22, 2025: POWER SUPPLY. INOPERATIVE. BATERY PACK CAPACITY CK FAILED AT FWD ENTRY L/H, AFT ENTRY LT, AND 17-23 ROWS LOCATION. SRXR430X. GROUNDED - YES. REMOVED AND REPLACED BATTERY POWER SUPPLY AT M
- [SDR ASAA2025101661634](https://openairdocs.org/sdr/ASAA2025101661634), Oct 16, 2025: POWER SUPPLY. FAULTY. FA REPORTS EMERGENCY LIGHT ABOVE ROW 27 IS ILLUMINATED DURING CLIMB & CRUISE, LIGHT EXTINGUISHED DURING DESENT. GROUNDED - YES. REMOVED AND REPLACED BATTERY/ PW
- [SDR ASAA2025092661173](https://openairdocs.org/sdr/ASAA2025092661173), Sep 26, 2025: LENS. MISSING. EXIT SIGN FORWARD OF 17F EMERGENCY EXIT MISSING. GROUNDED - YES. REPLACED LENS COVER AT 17F EXIT SIGN PER AMM 33-51-01. A/C OK FOR CONTIMUED SERVICE.
- [SDR ASAA2025090860767](https://openairdocs.org/sdr/ASAA2025090860767), Sep 8, 2025: LIGHT. NO DISCREPANCY. FA REPORTS WHITE EXIT LIGHT AT 16A REMAINS BRIGHTLY ILLUMINATED IN FLIGHT AND WILL NOT GO OUT. GROUNDED - YES. PERFORMED OPS CHECK IAW AMM 33-51-03. EXIT LIGHT 
- [SDR ASAA2024071050934](https://openairdocs.org/sdr/ASAA2024071050934), Jul 10, 2024: LIGHT. MISSING. CREW REPORTS PHOTO STRIP MISSING 24 INCHES. GROUNDED - YES. REPLACED PHOTOLUMINESCENT LIGHT STRIP. REF AMM 33-51-15.
- [SDR ASAA2023110245984](https://openairdocs.org/sdr/ASAA2023110245984), Nov 2, 2023: UNKNOWN. UNKNOWN. WHILE PERFORMING TSR715194 UPON ENGINE IDLE RUNT TEST ON ENG. 1 PRESENT LEG FAULT MAINT. MSG 36-10170 "IASC-L (BLEED) HAS NO ENGINE-1 PS3 AND T3 DATA ON MDS-DPC
- [SDR ASAA2023110145987](https://openairdocs.org/sdr/ASAA2023110145987), Nov 1, 2023: UNKNOWN. UNKNOWN. SMT MSG ENG 1 EEC C1 SHOWS. GROUNDED - YES. REF TSR715194 FOR CORRELATED FAULTS 73-43301 AND 73-43291. PERFORMED IFIM G73-202-00-810-855 AND TASK G73-21-00-810-
- [SDR ASAA2023103145960](https://openairdocs.org/sdr/ASAA2023103145960), Oct 31, 2023: UNKNOWN. UNKNOWN. GE DIAGNOSTICS REPORTS THE #1 ENGINE IS GENERATING ALERTS FOR PS3 OUT OF RANGE, PS3 PRESSURE DISAGREE FAULT, P3B OUT OF RANGE, P3B PRESSURE DISAGREE FAULT, OR P
- [SDR ASAA2023100445462](https://openairdocs.org/sdr/ASAA2023100445462), Oct 4, 2023: UNKNOWN. UNKNOWN. WHILE ACCOMPLISHING REINSPECT OF #2 ENG SCAVANGE SCREENS, 2 CHIPS WERE FOUND IIN #2 TGB SCREEN. REF DEFECT 60911349. GROUNDED - YES. (RESOLVED ON W/O: 1972433 T
- [SDR ASAA2023092045233](https://openairdocs.org/sdr/ASAA2023092045233), Sep 20, 2023: UNKNOWN. UNKNOWN. M-50 MATERIAL FOUND IN #2 ENG OIL SAMPLE.*DO NOT OPERATE #2 ENGINE UNTIL AOG ENGINEERING GIVES OK*. GROUNDED - YES. ON DEFERRAL..... REF TSR714998....FOUND MAIN
- [SDR ASAA2023091945214](https://openairdocs.org/sdr/ASAA2023091945214), Sep 19, 2023: FILTER. DIRTY. #2 ENGINE IS ALERTING FOR A SLIGHT OIL FILTER DELTA PRESSURE INCREASE INDICATING A POTENTIAL RDS ISSUE. (#PRIAOG/ETOPS) CNR 20230919040. GROUNDED - YES. (RESOLV
- [SDR ASAA2023090945015](https://openairdocs.org/sdr/ASAA2023090945015), Sep 9, 2023: SEAL. LEAKING. WHILE ACCOMPLISHING T/C SBLEAP-1B-72-0317-BSI-1 FOUND #2 ENG TGB SLEEVE LEAKING AFTER PART POWER LEAK CHECK. GROUNDED - YES. OPENED #2 ENG FAN COWLS REF AMM71-1
- [SDR ASAA2023090444918](https://openairdocs.org/sdr/ASAA2023090444918), Sep 4, 2023: UNKNOWN. UNKNOWN. AFCS INTLK 2 CB FOUND POPPED. GROUNDED - YES. INSPECTED C/B & ASSOC WIRING NO DEFECTS FOUND. RESET C/B REF MM 20-60-01 & WDM 22-11-12-2 PERFORMED MCP CMD/CWS IN
- [SDR ASAA2023082544784](https://openairdocs.org/sdr/ASAA2023082544784), Aug 25, 2023: UNKNOWN. UNKNOWN. AT T/D WITH FO SIDE AS MASTER, LOSS OF LNAV/VTKV, THEN IMMEDIATELY WENT AWAY. NORMAL OPS FOR REST OF ARRIVAL. GROUNDED - YES. COMPLIED WITH FMC RESET PER IFIM 3
- [SDR ASAA2023082244742](https://openairdocs.org/sdr/ASAA2023082244742), Aug 22, 2023: UNKNOWN. UNKNOWN. ENGINE 1 LEFT IGN INOP. GROUNDED - YES. FOUND FAULT 74-42492 IN HISTORY FOR LEFT IGNITION SYSTEMIS FAILED ON #1 ENGINE. TROUBLESHOT PER IFIM 674-00-00-810-822. 
- [SDR ASAA2023080644432](https://openairdocs.org/sdr/ASAA2023080644432), Aug 6, 2023: UNKNOWN. UNKNOWN. WHILE PERFORMING TASKCARD 72-ASA-04 FOUND LARGE AMOUNTS OF HPT1 SHROUD COATING MISSING. BASE MATERIAL IS PRESENT. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023080144352](https://openairdocs.org/sdr/ASAA2023080144352), Aug 1, 2023: UNKNOWN. UNKNOWN. WHILE ACCOMPLISHING T/C 05-020-01, FOUND "ENG 1 EEC C2" FAULT ON SCHEDULED MAINTENANCE TASK MESSAGES PAGE. GROUNDED - YES. PERFORMED IFIM TASK G73-10-00-810-803
- [SDR ASAA2023072844316](https://openairdocs.org/sdr/ASAA2023072844316), Jul 28, 2023: UNKNOWN. UNKNOWN. WHILE ACCOMPLISHING TC 05-020-01 DISCOVERED MESSAGE ENG. 2 EEC C2 ON SMT MESSAGES. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023072844306](https://openairdocs.org/sdr/ASAA2023072844306), Jul 28, 2023: UNKNOWN. UNKNOWN. WHILE ACCOMPLISHING T/C 31-005-00 FOUND SMT FAULT "PACK CONTROL CHANNEL R". GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023070843947](https://openairdocs.org/sdr/ASAA2023070843947), Jul 8, 2023: UNKNOWN. UNKNOWN. GE DIAGNOSTICS REPORTS #1 ENGINE IS GENERATING ALERTS FOR PS3 OUT OF RANGE, PS3 DISAGREE FAULTS, P3B OUT OF RANGE, P3B DISAGREE FAULTS, OR P3B VS PS3 PRESSURE D
- [SDR ASAA2023070143847](https://openairdocs.org/sdr/ASAA2023070143847), Jul 1, 2023: PRESSURE VALVE. DETACHED. WHILE ACCOMPLISHING T/C 72-ASA-03. ENGINE CLEANING, THE LOCK BOLT ON HPSOV CAME OUT WITH HELI-COIL ATTACHED. GROUNDED - YES. REMOVED AND REPLACED HPSOV VALVE AS
- [SDR ASAA2023061843728](https://openairdocs.org/sdr/ASAA2023061843728), Jun 18, 2023: UNKNOWN. UNKNOWN. DURING T/C 31-005-00, FOUND SMT BLEED PM SENSOR 1 R WITH ASSOCIATED FAULT 36-21021 ENGINE 2 MANIFOLD DUCT PRESSURE SENSOR 1 SIGNAL IS OUT OF RANGE. GROUNDED - Y
- [SDR ASAA2023061843726](https://openairdocs.org/sdr/ASAA2023061843726), Jun 18, 2023: UNKNOWN. UNKNOWN. DURING T/C 31-005-00, FOUND SMT BLEED PM SENSOR 1L WITH ASSOCIATED FAULT 36-21020 ENGINE 1 MANIFOLD DUCT PRESSURE SENSOR 1 SIGNAL IS OUT OF RANGE. GROUNDED - YE
- [SDR ASAA2023051943304](https://openairdocs.org/sdr/ASAA2023051943304), May 19, 2023: STARTER. FAULTY. APU FAULT LIGHT ILLUMINATED AFTER START ATTEMPT. SELECTED APU SWITCH OFF THE FAULT LIGHT WENT OUT. ATTEMPTED A SECOND START WITH THE SAME RESULT. FAULT LIGHT IL
- [SDR ASAA2023041743005](https://openairdocs.org/sdr/ASAA2023041743005), Apr 17, 2023: UNKNOWN. UNKNOWN. REF TASK CARD 05-020-01, #1 ENG HAS SCHEDULED MAINTENANCE TASK MESSAGE " ENG 1 EEC C1" WITH ASSOCIATED CORRELATED FAULT 73-43291. " COMPRESSOR DISAGREE PRESSURE
- [SDR ASAA2023040442733](https://openairdocs.org/sdr/ASAA2023040442733), Apr 4, 2023: UNKNOWN. UNKNOWN. RIGHT FWD WINDOW OVERHEAT ILLUMINATED AFTER LANDING. GROUNDED - YES. CLEARED AFTER 5 MIN COOLING PER QRH.
- [SDR ASAA2023040442695](https://openairdocs.org/sdr/ASAA2023040442695), Apr 4, 2023: MODULE. OUT OF RANGE. TECH SERVICES REQUEST FOR FOLLOW-UP TO SMT FAULT (LEFT FAMV FAULT 36-12030). GROUNDED - YES. REMOVED AND REPLACED #1 LH FAMV REFER TO B737-9 AMM 36-12-03/401.
- [SDR ASAA2023031242301](https://openairdocs.org/sdr/ASAA2023031242301), Mar 12, 2023: UNKNOWN. UNKNOWN. ON DESCENT WING ANTI ICE WAS TURNED ON. L VALVE ANNLIGHT ILLUMINATED. TURN OFF ANTI ICE SWITCH AND LIGHT WENT OUT. GROUNDED - YES. PERFORMED WING ANTI ICE OPERA
- [SDR ASAA2023012341580](https://openairdocs.org/sdr/ASAA2023012341580), Jan 20, 2023: WARNING LIGHT. FALSE ACTIVATION. RIGHT SIDE WINDOW HEAT OVERHEAT LIGHT ILLUMINATED. GROUNDED - YES. FOLLOWED QRH ON GROUND. LIGHT DID GO OUT WHEN RESET.
- [SDR ASAA2022122141316](https://openairdocs.org/sdr/ASAA2022122141316), Dec 21, 2022: FADEC. FAULTY. ENGINEERING REQUEST FOR T/S #1 ENG N1,N2 AND EGT PARAMETER DISAPPEARED IN FLIGHT. FOLLOW T/S STEPS AS MENTIONED IN DEFER TAB. GROUNDED - YES. REMOVED AND REPLAC
- [SDR ASAA2022112840965](https://openairdocs.org/sdr/ASAA2022112840965), Nov 28, 2022: WARNING MESSAGE. FALSE ACTIVATION. FMC DISAGREE EXTINGUISHED AFTER ASA QRH 11.2 PERFORMED. GROUNDED - YES. CYCLED FMC CBS. NO FAULTS. SYS OPS NML. REF B737-9 IFIM 34-61-00-810-918.
- [SDR ASAA2022111640945](https://openairdocs.org/sdr/ASAA2022111640945), Nov 16, 2022: VALVE. FAULTED. REF T/C 05-020-01 FOUND SMT ENG 1 EEC C1 FAULT LOGGED. CORRELATED MSG CODE 73-42771 & 73-42772. GROUNDED - YES. REMOVED AND REPLACED MODULATED TURBINE COOLING V
- [SDR ASAA2022100240145](https://openairdocs.org/sdr/ASAA2022100240145), Oct 2, 2022: FMC. MALFUNCTIONED. AFTER LANDING #1 FMC BEGAN FLASHING. GROUNDED - YES. NO FAULTS LOGGED - ACCOMP FMC SYS OPS CK PER B737-9 AMM 34-61-00, SYS OPS CKS NML. GND VERIFICATION SUCCESS
- [SDR ASAA2022091239937](https://openairdocs.org/sdr/ASAA2022091239937), Sep 12, 2022: UNKNOWN. UNKNOWN. WHILE SITTING BETWEEN RUNWAYS WAITING FOR A GATE STATIONARY ON HDG 135 DEGREE NAV DISPLAYS JUMPED TO 290 DEGREE HDGS. THEN FOR APPROX 1 MINUTE, BOTH DISPLAYS WA
- [SDR ASAA2022080739396](https://openairdocs.org/sdr/ASAA2022080739396), Aug 7, 2022: FMC. FAILED. AT CRUISE @ FL 350 @ APPROX. 1530Z. EXPERIENCED A DUAL FMC FAILURE. STARTED RUNNING QRH, SYS WAS OUT FOR APPROX 45 SEC THE SELF FIXED @ APPROX 1531Z. NO APPROAC
- [SDR ASAA2022072339195](https://openairdocs.org/sdr/ASAA2022072339195), Jul 23, 2022: SENSOR. INTERMITTENT. MAINT MESSAGE FOR APU OIL OTY ON START UP. MESSAGE # 49-94304. GROUNDED - YES. FOUND MESSAGE 49-94304 (OIL LEVEL SENSOR SHOWS CIRCUT FAILURE.)ACCOMPLISHED B737-
- [SDR ASAA2022062538797](https://openairdocs.org/sdr/ASAA2022062538797), Jun 25, 2022: PROCESSOR. WARNING LIGHT. BOTH "PWS FAIL" AND "WXR FAIL" ILLUMINATED AFTER TAKEOFF. GROUNDED - YES. VERIFIED WX FAIL-LOGGED 34-43100 WXR PROCESSOR 1 FAULT RESET WX RADAR SYSTEM WX RADAR 
- [SDR ASAA2022061238630](https://openairdocs.org/sdr/ASAA2022061238630), Jun 12, 2022: AUTOTHROTTLE SYS. WARNING LIGHT. ON FINAL W/ AP+AT ENGAGED AT FLAGGED AMBER A/T REST MULTIPLE TIMES. APPEARED TO FUNCTION NORMAL. GROUNDED - YES. TECHNICIAN AGREES W/ T/S NOTES REF B737-9 IFIM 
- [SDR ASAA2022060338559](https://openairdocs.org/sdr/ASAA2022060338559), Jun 3, 2022: DRAIN LINE. LEAKING. DURING NO.1 ENGINE IDLE RUN FOUND FUEL LEAK FROM MAIN FUEL PUMP PAD DRAIN LINE (MORE THAN 90 DROPS/MIN). GROUNDED - YES. R/R #1 ENGINE MAIN FUEL PUMP IAW B737-9
- [SDR ASAA2022052638451](https://openairdocs.org/sdr/ASAA2022052638451), May 26, 2022: AUTOTHROTTLE SYS. INTERMITTENT. AUTOTHROTTLE WILL NOT STAY ENGAGED. GROUNDED - YES. PERFORMED B737-9 IFIM 22-31-00-810-801, DFCS BITE FOUND FAULT MSG 22-31523 ON FLT LEG 7, THEN PERFORMED IFIM
- [SDR ASAA2022050838231](https://openairdocs.org/sdr/ASAA2022050838231), May 8, 2022: FMC. FAILED. RIGHT FMC FAILED AT CRUISE LASTED FOR 12-20 SECONDS AND SELF RECOVERED. GROUNDED - YES. REMOVED AND REPLACED RIGHT FMC REF B737-9 AMM 34-61-02/0401 OPS CHECK GO
- [SDR ASAA2022050738222](https://openairdocs.org/sdr/ASAA2022050738222), May 7, 2022: FMC. FALSE INDICATION. RIGHT FMC FAILED AT CRUISE STARTED WORKING AGAIN AFTER APPROX 2 MINUTES. GROUNDED - YES. ACCOMP FMC OPS TEST IAW B737-9 AMM 34-61-00-710-801 NO DEFECT NOTED. A/

## STCs that may be installed (OpenAirDocs) (105, first 50)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Boeing 737-9)

- [STC ST03438NY](https://openairdocs.org/stc/ST03438NY): Installation of Adams Rite Lavatory Equipment. Delta Engineering Corporation
- [STC ST04669CH](https://openairdocs.org/stc/ST04669CH): Installation of Honeywell Advanced Communications and Entertainment System (ACES). Honeywell Aerospace
- [STC ST09941AC](https://openairdocs.org/stc/ST09941AC): Installation of a Gables SATVOICE Annunciator Panel. L2 Aviation
- [STC ST02269NY](https://openairdocs.org/stc/ST02269NY): Installation of Self Illuminating Floor Path Marking System. Lufthansa Technik AG
- [STC ST00885LA](https://openairdocs.org/stc/ST00885LA): Installation of fire extinguisher cartridges as replacements for Pacific Scientific fire extinguisher cartridges in fire extinguisher bottles. AMETEK AMERON, LLC d/b/a MASS Systems
- [STC ST12443LA](https://openairdocs.org/stc/ST12443LA): Installation of Teledyne Controls Edge Computing Platform (ECP). Teledyne Controls, LLC
- [STC ST04474NY](https://openairdocs.org/stc/ST04474NY): Activation of Wireless Local Area Network (WLAN) system. Jet Aviation AG
- [STC ST04254NY](https://openairdocs.org/stc/ST04254NY): Installation of Viasat Satcom Software. ALOFT AeroArchitects
- [STC ST09927AC](https://openairdocs.org/stc/ST09927AC): Installation of a Gables Audio Management System. L2 Aviation
- [STC ST12005SE](https://openairdocs.org/stc/ST12005SE): Installation of Starlink Aviation System. Space Exploration Technologies Corp./Starlink Aviation
- [STC ST04040CH](https://openairdocs.org/stc/ST04040CH): Activation of Smart Runway and Smart Landing (SRSL) Runway Awareness Advisory System (RAAS) Functions for Honeywell Mark V and Mark V-A Enhanced Ground Proximity Warning Systems (EGPWS). Honeywell International Inc
- [STC ST00555AT](https://openairdocs.org/stc/ST00555AT): Installation of Airshow 210 system. AIRCRAFT RECONFIG TECHNOLOGIES, LLC. Lists 737 Series
- [STC ST04384AT](https://openairdocs.org/stc/ST04384AT): Interior reconfiguration installation. AIRCRAFT RECONFIG TECHNOLOGIES, LLC
- [STC ST00952LA](https://openairdocs.org/stc/ST00952LA): Installation of Mass Systems fire extinguisher cartridges as replacements for Kidde fire extinguisher cartridges in fire extinguisher bottles. AMETEK AMERON LLC d/b/a MASS Systems
- [STC ST04328NY](https://openairdocs.org/stc/ST04328NY): The Manufacture and Installation of Exterior Placards, Labels and Signs is to be performed, installed. Libellule Monde Inc
- [STC ST03405NY](https://openairdocs.org/stc/ST03405NY): Installation (with demod option) of an Connectivity Antenna. Delta Engineering Corporation
- [STC ST04758NY](https://openairdocs.org/stc/ST04758NY): Installation of single cockpit USB charger. Eirtech Aviation Services Inc
- [STC ST09844DS](https://openairdocs.org/stc/ST09844DS): This project installs a new Next-IS media server and installation provisions to interface with the Starlink IFC system. United Airlines
- [STC ST04052NY](https://openairdocs.org/stc/ST04052NY): ViaSat KA Cabin Distribution System Installation. ALOFT AeroArchitects
- [STC ST02908NY](https://openairdocs.org/stc/ST02908NY): Installation of a Panasonic Avionics Corporation Global Communications Suite (GCS) and/or In-Flight Entertainment (IFE). Delta Engineering Corporation
- [STC ST04051NY](https://openairdocs.org/stc/ST04051NY): ViaSat KA SATCOM Antenna System Installation. ALOFT AeroArchitects
- [STC ST00030IB](https://openairdocs.org/stc/ST00030IB): Installation of Test Tech ELT. APTOZ EHF
- [STC ST03885AT](https://openairdocs.org/stc/ST03885AT): Installation of an Avionica, Inc. avCM Cellular Module. Aircraft Systems and Manufacturing Inc
- [STC ST12102IB](https://openairdocs.org/stc/ST12102IB): Installation of a Honeywell Aspire 400 SBB Satcom and/or an AMT-3800 high gain antenna. Jet Aviation AG
- [STC ST12059IB](https://openairdocs.org/stc/ST12059IB): Installation of Seat to Floor Interface - isotropic intercostals for installation of seats and divans. JET AVIATION AG
- [STC ST04243NY](https://openairdocs.org/stc/ST04243NY): Installation of the ALOFT AeroArchitects Auxiliary Fuel System (AFS). ALOFT AeroArchitects
- [STC ST04368AT](https://openairdocs.org/stc/ST04368AT): Installation of a Rockwell Collins CMU-900 ACARS/CPDLC Communication Management Unit P/N 822-1239-151 to provide Data Link communications via existing data link capable VHF Mode 2 (VDLM2), HF and/or SATCOM systems and host the CPDLC application which support EASA Link 2000+ communications. LB Aircraft Engineering Inc
- [STC ST00079IB](https://openairdocs.org/stc/ST00079IB): Integration of Halon-free Portable Fire Extinguisher HAFEX. UMLAUT ENGINEERING GMBH
- [STC ST00215IB](https://openairdocs.org/stc/ST00215IB): Installation of saf-Tglo ECO Photoluminescent Aisle Path Marking Systems. STG AEROSPACE GERMANY GmbH
- [STC ST01936WI](https://openairdocs.org/stc/ST01936WI): Installation of LED lights. AeroLED's Holdings LLC
- [STC ST09830DS](https://openairdocs.org/stc/ST09830DS): AVOD Integration on Boeing B737-9 fleet. United Airlines
- [STC ST04585AT](https://openairdocs.org/stc/ST04585AT): Installation of a Cobham AVIATOR 200S Inmarsat / Swift Broadband Satellite Communications System. Avionics Support Group
- [STC ST04071NY](https://openairdocs.org/stc/ST04071NY): Installation of VisionSafe Emergency Vision Assurance System (EVAS). VisionSafe LLC
- [STC ST03952NY](https://openairdocs.org/stc/ST03952NY): Installation of Controller-Pilot Data-Link communications. 365 Aerospace Ltd Aerospace Logistics Centre
- [STC ST03403NY](https://openairdocs.org/stc/ST03403NY): Installation of a Intelsat Cabin Connectivity (with demod option) system. Delta Engineering Corporation
- [STC ST04493AT](https://openairdocs.org/stc/ST04493AT): Interior Reconfiguration (Carpet Installation). ZIM Aircraft Cabin Solutions LLC
- [STC ST00161IB](https://openairdocs.org/stc/ST00161IB): Installation of a DK180 Underwater Locator Device (ULD) using Dukane mounting bracket. Fokker Services B.V
- [STC ST00158IB](https://openairdocs.org/stc/ST00158IB): Installation of Tablet Cradle, consisting of the installation of 2 arm mounts on the existing sliding windows (both sides, Captain and First Officer). PMV Engineering
- [STC ST04203AT](https://openairdocs.org/stc/ST04203AT): Installation of a Constant Friction Mount , Cradle, and Integrated Power Supply. Avionics Support Group Inc
- [STC ST11386DS](https://openairdocs.org/stc/ST11386DS): Installation of USB Charging Hubs on the Flight Deck. Aircraft Systems and Manufacturing Inc
- [STC ST00792NY](https://openairdocs.org/stc/ST00792NY): Installation of evacuation slide and compartment assemblies. Air Cruisers
- [STC ST00126IB](https://openairdocs.org/stc/ST00126IB): Replacement of Halon agent with alternate Halon-free Portable Fire Extinguisher agent. AMAC Aerospace Switzerland AG
- [STC ST00140IB](https://openairdocs.org/stc/ST00140IB): Installation of Potable Water Pre-Select system. International Water-Guard Industries Inc
- [STC ST04664NY](https://openairdocs.org/stc/ST04664NY): Activation of Wireless Local Area Network (WLAN) system. AMAC Aerospace AG
- [STC ST00121IB](https://openairdocs.org/stc/ST00121IB): Installation of photoluminescent floor path marking with the option to install LED lighting. Cobalt Aerospace Limited
- [STC ST04562NY](https://openairdocs.org/stc/ST04562NY): Installation of saf-Tglo® SuperSeal UltraLite-X (SSUL-X) Photoluminescent Floor Proximity Emergency Escape Path Marking Systems. STG AEROSPACE GERMANY GmbH
- [STC ST00105IB](https://openairdocs.org/stc/ST00105IB): Introduction of Activation of Wireless Charging Systems for Portable Electronic Devices. AMAC AEROSPACE SWITZERLAND AG
- [STC ST04594CH](https://openairdocs.org/stc/ST04594CH): Installation of a Viasat Cellular Data Modem (VCDM). Envoy Aerospace LLC
- [STC ST02747SE](https://openairdocs.org/stc/ST02747SE): Remove existing two (2) Branding Panels from forward monuments and install new two (2) Jamco Branding Panels on Boeing Model 737-9 aircraft. Jamco America, Inc
- [STC SA00787SE](https://openairdocs.org/stc/SA00787SE): Installation of Sliding Carpet Cargo Loading System in the cargo compartment. SBC-America LLC

All 105: https://openairdocs.org/aircraft/N972AK/stcs.md

## Related

- Other Boeing 737-9 aircraft: https://openairdocs.org/model/boeing-737-9/aircraft.md
- The CFM International LEAP-1B28 series engine: https://openairdocs.org/engine/cfm-international-leap-1b28-series.md

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